Dyno Guesses & Bench Racing Forum - Gains from ported AFR225 heads & 3" Catback on single turbo 347ci

What's guys!! :D

As some of you know I dynoed my car a couple of months back with my custom single ST80 turbo setup...

http://ls1tech.com/forums/forced-induction/1474866-st80-347ci-dyno-number-10psi.html

With stock 241 untouched heads and stock TI catback
10psi made 585-595rwhp 545-550rwtq with conservitve tune...
after that the 5 years old 347ci short block gave up (oil press dropped and slight knocking noise 3000-3500rpm) I'll rebuild it for another project
:D

So I found another 347ci short block 9:1 build by Kurt Urban with ported AFR225 heads , keeping Brute Speed cam , LS6 Intake, ported TB for now and also bought XSPower 3'inch awesome catback.... :cool:

My questions is how much do you think the car will gain with the same boost level after the heads and catback? Keep in mind I had 242 heads and stock catback...

Of course after that I'll be turning up the boost 20+psi to see the limit of the ST80 83mm turbine 1.15AR :nod:


Thanks
Sam..